diff --git a/doc/reference/semantics.qbk b/doc/reference/semantics.qbk
index 0710a99..c7cf8f4 100644
--- a/doc/reference/semantics.qbk
+++ b/doc/reference/semantics.qbk
@@ -60,7 +60,7 @@
     ]
     [
         [`range_difference<X>::type`]
-        [`boost::iterator_category<range_iterator<X>::type>::type`]
+        [`boost::iterator_difference<range_iterator<X>::type>::type`]
         [compile time]
     ]
     [